Jack Quaid loved playing 'a real s---head' in twisty romantic thriller 'Companion' — even when the crew rooted against him on set.

Warning: spoilers ahead! 'Companion' stars Jack Quaid and Sophie Thatcher plus writer/director Drew Hancock break down that wild, violent ending.

Plus, Thatcher wants to join an iconic horror franchise and Quaid says this is the 'most insecure character' he's ever played.

Quaid is best known for his darkly comedic work on “The Boys,” as well as his voice work in the Star Trek canon on “Lower ...